Table 1

Arterial oxygen partial pressure (PaO2) and acid-base status in Australian (AUS) and Bolivian (BOL) football players at near sea-level and during 12 days at 3600 m

La Paz Day 5Santa CruzLa Paz Day 1La Paz Day 3La Paz Day 5/7La Paz Day 12/16
PaO2 (mm Hg)AUS71.3±8.543.9±2.6***, +++43.5±2.1***, +++51.1±3.7***, xxx56.1±2.2***, xxx, +++
BOL54.3±2.4***, xxx75.7±6.848.2±3.4***47.9±2.5***, xxx51.9±2.2***, xxx60.0±2.6***, xxx
PaCO2 (mm Hg)AUS39.7±2.439.1±2.335.8±2.3***32.4±2.3***30.7±1.3***
Actual bicarbonate (mmol/L)AUS24.8±1.124.1±1.320.4±2.0***20.6±1.3***, +20.1±0.7***
base excess (mmol/L)AUS0.7±1.20.1±1.6−3.6±1.5***−3.3±1.7***, +−3.4±0.9***
  • Significant differences from the near sea-level values are indicated as *p<0.05, **p<0.01, ***p<0.001.

  • Significant differences from the value determined 2 h after arrival at altitude (only for PaO2) are indicated byxxx p<0.001.

  • Differences between the Australian and Bolivian football players are presented as +p<0.05, +++p<0.001.

  • PaCO2, arterial partial pressure for CO2.